In the special features for “X-Men: First Class,” Frances Hannon, head of the makeup and hair department, said they did at least 20 tests — painting different women — to find the right shade of blue for Lawrence’s character.

Lawrence said Mystique’s scales were attached first, followed by three layers of blue paint airbrushed onto her, and then another five layers of what the actress called a splattering effect were applied.

According to Hannon, it would take six girls about seven hours to paint her full body.

"I know that everyone feels sorry for me, but it's so much fun," added Lawrence. "It's like a sleepover, except I'm naked and getting painted."